I know some people want to know, so I'll just say it here. Currently I didn't write overview for Central. There are many reasons:
1. We already play as Central in this game. The game already shows you how Central is like and view things from Central's perspective. So far I couldn't come up with unique stuff to write without basically repeat what's already been said in the game.
2. Lore about Central is too susceptible to future change. For example, if developer decide to add more story about Lady Miles or other nobles I'll have to revise all politics lore to see if it's compatible. Hell, I might even have to rewrite military system every time a new vanguard commander is added if some details conflict my lore.
If I can somehow overcome those problems, I'll definitely write one for Central.